GATE 2019: Manufacturing Quiz 11

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Question 1

A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimension in mm). The feed rate used for milling is 50 mm/min. milling time for the slot (in seconds) is

• A120
• B170
• C180
• D240

Question 2

In a CNC program block, N002 G02 G91 X40 Z40…, G02 and G91 refer to

• Acircular interpolation in counterclockwise direction and incremental dimension
• Bcircular interpolation in counterclockwise direction and absolute dimension
• Ccircular interpolation in clockwise direction and incremental dimension
• Dcircular interpolation in clockwise direction and absolute dimension

Question 3

Circular arc on a part profile is being machined on a vertical CNC milling machine. CNC part program using metric units with absolute dimensions is listed below:
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N60 G01 X 30 Y 55 Z – 5 F 50
N70 G02 X 50 Y 35 R 20
N80 G01 Z 5
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The coordinates of the centre of the circular arc are :

• A(30, 55)
• B(50, 55)
• C(50, 35)
• D(30, 35)

Question 4

In a 2-D CAD package, clockwise circular arc of radius, 5, specified from P1(15, 10) to P2(10, 15) will have its center at

• A(10, 10)
• B(15, 10)
• C(15, 15)
• D(10, 15)

Question 5

Match the items of List I (Equipment) with the items of List II (Process) and select the correct answer using the given codes.

• AP – 2 Q – 1 R – 4 S – 5
• BP – 4 Q – 2 R – 3 S - 5
• CP – 4 Q – 5 R – 1 S - 2
• DP – 3 Q – 5 R – 2 S – 1

Question 6

In a CAD package, minor image of a 2D point P (5,10) is to be obtained about a line which passes through the origin and makes an angle of 45 °counterclockwise with the X-axis. The coordinates of the transformed point will be

• A(7.5, 5)
• B(10, 5)
• C(7.5, -5)
• D(10,-5)

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